Tilting release for gyratory crushers



Sept, 12, 1944 E. B. sYMoNs ET AL.

. TLTING RELEASE FOR GYRATORY CRUSHERS Filed Aug. 1'7, 1942 3 Sheets-Sheet l Sept. '12, 1944. E. B. sYMoNs Erm.

y TILTING RELEASE FOR GYRA'I'ORY CRUSHERS Filed Aug; 17, 1942 3 Sheets-Sheet 2 I verda/15 jaf ,5y/220735 ZUJJ ferner y Mm M Sept. 12, 1944. E. B. sYMoNs ET Al.

TILTING RELEASE FOR GYRATORY CRUSHERS Filed Aug. 17, 1942 5 Sheets-Sheet 3 E /J R\ KN -l K W@ NN r1 lw Q N\ N \h k\ NN i.. Il -..I 'NIMH 1- '.21 www 1| l||| l WXI 1 I l |||MN .www QW bw y www @y ,wam am ,W wyW f 5J www w MK y QN @n R, mw w n Patented Sept. l2, 1944 TILTING RELEASE FOR GYRATORY CRUSHERS Edgar B. Symons, Hollywood, Calif., and Ewald `Werner, Milwaukee, Wis., assignors to Nordberg Manufacturing Co., Milwaukee, Wis., a corporation of Wisconsin Application August 17, 1942, Serial No. 455,062

13 Claims. (-Cl. 83-10) The invention relates to an improvement in tilting releases for gyratory crushers, and has for one purpose the provision of a release for the bowl of a gyratory crusher. i

Another purpose is the provision of means for guiding the releasing part with a. minimum of wear on the opposed parts.'

Another -purpose is the provision of improved yielding means for maintainingl the parts normally flxed.

Another purpose is the provision of improved pivot means or pivotal engagement' between the fixed and moving parts involved.

Another purpose is the provision of improved guiding` or retaining means toprevent lateral displacement rof themoving or releasing part when tilted in relation to the fixed part, for example by the 'passage of uncrushable material through the crushing cavity of the crusher.

IAnother purpose is the provision'of improved means-forvpermitting a releasingmovement of the bowl of a gyratory crusher, with a minimum of wear or pounding-between their opposed'sup-` porting surfaces.

' grammatically in the accompanying drawings wherein:

Fig. 1 is a vertical axial section;

Fig. 2 is a section on the line 2-2 of Fig. l, with the moving crushing element in plan view:

Fig. 3 is a partial section similar to Fig. 1', showing the release in operation; and

5 upwardly concave `corresponding bearing II, I2 is any suitable dust sealing means.

Il is a movable mantle or wear taking element held down for example by the upper thrust member or nut I4. ing plate. Since the parts and details of the head, and means for gyrating it, are not of themselves important in relation to the present invention, they are not described in great detail. It will be understood that rotation of the shaft 8, through any suitable driving means, causes a gyration of the crushing head, with a movement of substantial amplitude toward and away from the normally fixed bowl below described.

The outer frame member I is provided at its upper edge with-.an outwardly extending ange I6 of substantial diameter. This flange has an inner tapered surface I1, increasing in diameter progressively from bottom to top. Normally seated against this surface I1 and overlying the top of the flange I6 is a tilting ring or bowl support I8. It will be observed that it is recessed, as at I9, to receive an annular upward projection 20 from the flange I 6. When the parts are at rest, as shown in Fig. 1, there need normally be no contact between the opposed parts of the ring I 8 and the flange I6, except along the tapered surface I1. The relationship of the parts is shown in somewhat greater detail in Fig. 4.

Fig. 4 is a partial radial section on an enlarged There may be a close approach and possibly a contact at thepoint X, as shown in Fig. 4. It will be observed that the outer face of the flange 20 is slightly arcuate, as at 2|, so that in effect a rolling contact is provided when the tilting ring I8 is raised because of the presence at one side of the crushing cavity of uncrushable material, such as tramp iron, or packed fines, or the like. An uncrushable element is diagrammatically shown, as at 22, in Fig. 3, and as causing the upward tilting of the left side of the tilt- I5 is any suitable feed distributabutment segments 25, through which the lower ends of the bolts 23, 24 pass. Bolts 28 may be employed to vary the compression of the springs.

It will be observed that the bolts have rounded surfaces 21 for engagement with opposed parts of the segments 25. Similarly, the heads 28 of the bolts 23, 24 are rounded or made spherical where they engage the upper portions of the surface of the tilting ring I8. The springs 3| may be centered in any suitable manner.' One spring surrounds each of the bolts 23, 24. Other springs may be guided by downwardly extending bosses 29 on the bottom of the tilting ring I6 and by corresponding upwardly extending bosses 30 on the top of the segment 25.

In order to prevent rotation of the ring I8 in relation to the flange I6, we may also provide pins 32 penetrating apertures 33 in the tilting ring I8.

Any suitable number of such pins may be employed, and the lower ends, as at 34, may also serve to guide the upper end of Whichever spring 3| is associated therewith. It will be understood that the springs 3| are so compressed as normally to hold the ring I8 fixed in relation to the flange I6 at any ordinary crushing stress. However, if uncrushable material, such as the particle 22, is nipped in the crushing cavity, the tilting ring may rise against the compression of the springs 3| on the side of the orusher where the particle 22 is positioned.

The bowl structure proper includes an outer and generally cylindrical wall 38, which is screw threaded, as at 31, in opposition to threads 38 on the vertical inner surface of the ring I8.

It will be understood that a rotation of the bowl 'structure in relation to the ring may be obtained in any suitable manner in order to adjust the bowl upwardly or downwardly.

The bowl support also includes an upwardly and inwardly extending wall 39, and a downwardly and inwardly extending wall 40, the two walls converging and enclosing a hollow space 4I, within which may be located any suitable locking means, for example the U-bolts 42, which may engage hook-shaped lugs 43, which extend through apertures 44 of the wall 39, and which are secured to and formed integrally with the bowl liner 45. However, the details of the bowl and bowl liner do not of themselves form part of the present invention and will not be further described.

Any suitable feed distributing element 58 may be employed, with its down spout and adjustable supports 52, which are supported on the lugs 53 of the flange I6.

It will be observed that the outwardly extending flange I6 is supported by ribs or brackets 80,

which may be formed integrally with the outer main frame element.

It will be realized that,vwhereas we have described and illustrated a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of the invention. `We therefore wish that the drawings and description be taken as in a broad sense illustrative or diagrammatic, rather than as a limitation to the precise showing.

The use and operation of the invention are as follows:

The head of the crushing structure shown in the present drawings has a substantial lateral excursion, as will be observed by comparing the closed side and ,the open side of the crushing cavity, as shown in Fig. 1. The device is normally sparsely fed by means of the cooperation of the spout 5I, the feed plate I5, and the lower feedingY hopper 6I. The details of the feed limitation do not form part of the present invention, but it will be understood that, in the normal operation of the device, the cavity is sparsely fed, and the crushing process of Symons Patent No. 1,537,565 is practiced thereby.

It may happen that, either with packed Wet material or, more frequently, with tramp iron, an uncrushable mass may be present in the crushing cavity, which is of greater radial extension than the radialv width of the crushing cavity at the closest approach of head to bowl; The member 22 of Fig.I 3 diagrammatically represents such a mass or piece of tramp iron. In that event, the springs 3| on the side of the machine adjacent the location ofy the crushing mass will give, the segments 25 being upwardly drawn by bolts 23, 24, and' the side of the ring I8 tilting upwardly, as shown at vthe left of Fig. 3.

When this takes place, thel opposite side of the ring serves as a pivot, as at the right of Fig. 3, a rolling contact being provided by the arcuate surface 2| shown in Fig. 4. The part of the ring I8 directly radially aligned with the uncrushable mass 22 may even rise entirely clear of the upper edge of the flange 20.

However, when the ring is tilted,.the straight surface I9 of the ring I8 will bear on the upward projection 20 of the flange I6, in the position in which the parts are shown at the right side of Fig. 3. Simultaneously, the cylindrical surface 2|a of the ring I8 will bear against the arcuate surface 2| of the flange I8. Even if under any circumstances the part of the ring I8 closest to the uncrushable mass 22 lifts entirely above the portion 20 of the frame, the tiltabie ring is still properly centered since throughout almost all of the periphery of the machine the cylindrical face 2 Ia will be in contact with the arcuate face 2 I.

'I'he parts are centered, however, and lateral movement is prevented byv the engagement between the surface 2|, and the opposed generally cylindrical surface 2|a of the ring I8, and the two parts are in contact all of the time, and lateral movement of the ring .I8 is prevented. There is, therefore, no possibility of damaging wear between the inclined surface I1 of the flange I6 and the opposed surface I1a of the ring I8 when the ring I8 returns to its normal position after it has been tilted upwardly to permit the pas.. sage of steel or other uncrushable material through the crushing cavity. As will be observed in Fig. 3, when the ring I8 is tilted, all of the conic face I1a of the ring clears the opposed conic face I1 of the frame. Note that in Fig.

3 there is a slight clearance at the right-hand or pivot side of the ring, and a substantially wider clearance at the left-hand or tilted side of the ring. After the uncrushable mass has been removed from or passed from the crushing cavity and the ring settles down in position, the opposed conic faces I1 and I1a come into contact without any relative lateral movement. 'I'he direct downward impact wil1 not do any harm, and any injurious relative lateral movement of the parts is prevented.

It should be kept in mind that the employment of a rocking, shifting engagement between the ring I8 and the opposed part of the frame, very substantially reduces wear. It will be understood that where in the claims, I employ the term rocking, shifting, I mean to describe the rocking relationship which exists between the opposed parts of the ring and the flange 20, in contrast to a movement of the opposed parts which would involve a slipping or sliding movement of the ring I8 across the opposed surfaces of the flange 20. The prevention of such slipping, sliding movement is one of the objects of the present invention. The point X in Figure 4 indicates the point .of rocking contact which shifts downwardly as the opposite side of the ring I8 moves upwardly. When the ring I8 is tilted upwardly away from the flange 20, its only point of contact is the rocking contact area represented by X. When it moves into horizontal position, the sufaces I1 and Ila are in contact and receive the weight of the lbowl. The contact X then serves as a centering contact. It will also be understood that when, as in Figure 3, an uncrushable member 22 causes one side of the bowl and ring to rise, the thrust of the head against the member 22, and thus against the bowl, is outward as well as upward. This tends to move the lifting side of the ring I8 away from the flange 20, thus preventing any substantial frictional wear. On the side where the contact exists, as in X in Figure 3, the relative movement is a rocking,

tilting movement'without slippage of the opposed parts.

It should be kept in mind that the centering effect of the contact of the surfaces 2l and 2Ia maintains the axis of the bowl substantially concentric with the axis of the machine as a whole or the axis or center of the frame flange 20. In other words, substantially no bodily lateral movement of the tilting ring I8 and the parts associated thereby is permitted. When an uncrushable body passes into the crushing cavity and causes the ring I8 to tilt', the surface 2Ia rolls or rocks across the surface 2|, referring to the -position of the parts as shown in Figure 4. The

opposite side of. the ring tilts upwardly. Throughout the entire circumference of the ring and frame, the surfaces I1 and I1a are separated. 'Ihe upward tilting of .the ring effects a clean separation of the two surfaces with substantially no shearing, wear or engagement. It will be observed that the bolts 28 are not relied upon to resist the lateral movement of the tilting ring and its associated parts. opposed surfaces 2| and 2Ia is effective to maintain the desired alignment and to prevent the undesired lateral movement. Thus, there is a minimum of wear of the opposed surfaces I'I and I'Ia. The area of the surfaces 2| and 2Ia is sufflciently great, also tolprevent any substantial wear of the opposed parts in response to the limited and substantial relative vertical movement of the surface 2Ia in relation to the surface 2|.

We claim:

1. In a gyratory crusher a normally fixed circumferential frame, a head mounted for gyration in relation to said frame, a bowl surrounding said head, a tiltable support for said bowl, including a ring tiltably mounted on said frame, means for yieldably urging said ring downwar ly against said frame, and means for preventing lateral movement of said ring in relation to said frame when the ring is tilted, including a circumferential flange on said frame, said ring having a surrounding face opposed thereto, said frame flange having an outer generally cylindrical -generally vertical surface with a vertical extension exceeding lthe upward movement of the lower edge of the surrounding ring face at an The opposition of the 2. In a gyratory crusher a normally xed cir-l cumferential frame, a head mounted for gyration in relation to said frame, a bowl surrounding said head, a tiltable support forsaid bowl, including a ring tiltably mounted on said frame,

means for yieldably urging said ring downwardlyl against said frame, and means for preventing lateral movement of said ring in relation to said frame when the ring is tilted, including a circumferential flange on said frame, said ring having a surrounding face opposed thereto, said frame ange having an outer generally cylindrical generally vertical surface with a vertical exangular distance of from the point about 75 tension exceeding the upward movement of the lower edge of the surrounding ring face at an angular distance of 90 from the point about which the ring tilts, whereby the ring is held against lateral movement during its tilting.

3. In combination, in a gyratory crusher, a fixed circumferential frame, a head mounted for gyration within said frame, a bowl opposed to said head, and a tilting connection between said bowl and said frame including a circumferential annular portion having a circumferential concavity in a lower face thereof, the frame including a portion adapted normally to extend into said concavity, yielding means adapted normally to extend into said concavity, yielding means adapted normally to prevent movement of said annular portion in relation to said frame,

the opposed surfaces of the frame and the annular concavity including portions adapted to maintain continuous contact, and to prevent `lateral movement of the bowl in relation to the main frame, during a substantial range of tilt of the bowl in relation to the frame in response to the presence of uncrushable material in the crushing cavity, the frame having 'an upstanding exterior generally cylindrical surface, the concavity having an interior generally cylindrical surface opposed to and surrounding said first mentioned cylindrical surface, the height of said surfaces being sufcient to' provide a substantial overlap during tilting of the bowl, said generally cylindrical frame surface being outwardly slightly convex in vertical radial section.

4. In combination, in a gyratory crusher, a fixed circumferential frame, a head mounted for gyration within said frame, a bowl opposedgto said head,l and a tilting connection between said bowl and said frame including a circumferential annular portion'having a circumferential concavity in a lower face thereof, the frame including a portion adapted normally to extend into said concavity, yieldingl means adapted normally to prevent movement ,of said annular portion in relation to said frame, the opposed surfaces of the frame and the annular concavity including portions adapted to maintain continuous contact, and to prevent lateral movement of the bowl in relation to the main frame, during a substantial range of tilt of the bowl in relation to the' frame' vmaterial through the crushing cavity, including yielding means tendingA normally to urge the bowl downwardly in relation to the frame, and

means for preventing lateral displacement of the bowl when the bowl is upwardly tilted by the passage of uncrushable material through the crushing cavity, including a portion on the frame having an outer generally cylindrical surface and an opposed portion of the bowl having an inner generally cylindrical surface, the surfaces being at all times closely opposed, both surfaces being generally parallel with the axis of the machine, whereby lateral displacement of the bowl during tilting is positively prevented, the surface on the bowl being slightly convex in vertical cross section.

6. In combination, in a gyratory crusher, a circumferential frame, a head mounted for gyration in relation to the frame, a bowl opposed to the head, and means for holding the bowl normally fixed against movement in relation to the frame, while permitting movement of the bowl from the head in response to the passage of uncrushable material through the crushing cavity, including yielding means tending normally to urge the bowl downwardly in relation to the frame, and means for preventing lateral displacement of the bowl when the boyl is upwardly tilted by the passage of uncrushable material through the crushing cavity, including a portion on the frame having an outer generally cylindrical surface and an opposed portion of the bowl having an inner generally cylindrical surface, the surfaces being at all times closely opposed, both surfaces being generally parallel with the axis of the machine, whereby lateral displacement of the bowl during tilting is positively prevented. l

'1. In combination, in a gyratory crusher, a circumferential frame, a head mounted for gyration in relation to the frame, a bowl opposed to the head, and means for normally holding the bowl normally fixed against movement in relation to the frame, including an annular flange at the top of the frame, said flange having an outer generally cylindrical face, slightly convex in vertical radial section, and an inner face inclined downwardly and inwardly toward the axis of the crusher, and an exterior ring surrounding the bowl and having a downwardly open recess, the outer face of which is generally cylindrical and is opposed to the outer face of said flange, the inner face of which is formed to conform generally to the downwardly and inwardly inclinedlface of the flange, and yielding means tending normally to hold said ring downwardly against said flange with said downwardly and inwardly inclined faces in contact, and with the cylindrical face of the ring surrounding and opposed to the generally cylindrical outer face of said flange, the outer portion of the ring being at' all times out of contact with that part ofthe frame which is exterior to the flange. 8. In combination, in a. gyratory crusher, a circumferential frame, a head mounted for gyration in relation to the frame, a bowl opposed to the head, and means for normally holding the bowl normally xed against movement in relation to the frame, including an annular flange at the top of the frame, said flange having an outer generally cylindrical face slightly convex in vertical radial section, and an inner face inclined downwardly and inwardly toward the axis of the crusher, and an exterior ring surrounding the bowl and having adownwardly open recess, the outer face of which is generally cylindrical and is opposed to the outer face of said flange, the inner face of which is formed to conform generally to the downwardly and inwardly inclined face of the flange, and yielding means tending normally to hold said ring downwardly against said flange with said downwardly and inwardly inclined faces in contact,vr and with the cylindrical face of the ring surrounding and opposed to the generally cylindrical outer face of said flange,

said flange having an upper surface extending generally horizontally between its cylindrical and its inclined surfaces, said upper surface being at all times out of contact with the opposed surface of the recess in the ring.

9. In combination, in a gyratory crusher, a circumferential frame, a head mounted for gyration in relation to the frame, a bowl opposed to the head, and means for holding the bowl normally xed against movement in relation to the frame, including an annular flange at the top of the frame, said flange having an outer generally cylindrical face slightly convex in vertical radial section, and an inner face inclined downwardly and inwardly toward the axis of the crusher, and an exterior ring surrounding the bowland having a downwardly open annular recess, the outer face of which is generally cylindrical and is opposed to the outer face of said flange, the inner face of which is formed to conform generally to the downwardly and inwardly inclined face of the flange, and yielding means tending normally to hold said ring downwardly against said flange with said downwardly and inwardly inclined faces in contact, and with the cylindrical face of the ring vsurrounding and opposed to the generally cylindrical outer face of said flange,

10. In combination in a gyratory crusher, a fixed circumferential frame, a head mounted for gyration in relation to said frame, a bowl opposed to said head, means for normally holding said bowl fixed against movement in relation to said frame, and release means therefor, including opposed interpenetrating members on bowl and frame, yielding means tending normally to hold them fixed in relation to each other, said members having opposed parts adapted to prevent lateral movement of the bowl when the bowl is tilted by the presence of uncrushable material in the crushing cavity, said, parts including an upward shoulder on the frame having a generally cylindrical but slightly barrel shaped surface with a free upper edge, the ring having a portion downwardly extending thereabout, the ring and the frame having opposed generally conic faces `located radially inwardly from said generally cylindrical surface, the generally conic surface of the frame being adapted to receive the surface of the ring in a supporting relationship when the ring is at rest.

l1. In combination, in a gyratory crusher, a flxed'circumferential frame, a head mounted for gyration in relation to said frame, a bowl 'Opposed to said head, means for normally holding said bowl fixed againstr movement in relation to said frame, and release means therefor, including opposed interpenetrating members on bowl and frame, yielding means tending normally to hold them fixed in relation to each other, said members having opposed parts adapted to prevent lateral movement ofthe bowl when the bowl is tilted by the presence of uncrushable material in the crushing cavity, said parts including an upward shoulder on the frame having a generally cylindrical but slightly barrel shaped surface with a free upper edge, the ring having a portion downwardly extending thereabout. y

12. In a gyratory crusher a normally fixed circumferential frame, a head mounted for gyration in relation to said frame, a bowl surrounding said head, a tiltable support for said bowl, including a ring tiltably mounted on said frame, means for yieldably urging said ring downwardly against said frame, and means for preventing lateral movement of said ring in relation to said frame when the ring is tilted, including a frame portion having an outer generally cylindrical, generally vertical surface, said ring having a ,surrounding face opposed thereto, said generally cylindrical surface having a vertical extension exceeding the upward movement of the lower edge of the surrounding ring face at an angular distance of ninety degrees from the point about, which the ring tilts, whereby the ring is held against lateral movement during its tilting.

13. In a gyratory crusher a normally flxedcircumferential frame, a head mounted for gyration in relation to said frame, a bowl surrounding said head, a tiltable support for said bowl, including a ring tiltably mounted on said frame, means for yieldably urging said ring downwardly` against said frame, and means for preventing lateral` movement of said ring in relation to said frame when the ring is tilted, including a frameportion having an outer generally cylindrical, generally 

